includes/OutputPage.php

   1 <?php
   2 if ( ! defined( 'MEDIAWIKI' ) )
   3         die( 1 );
   4 /**
   5  */
   6
   7 /**
   8  * @todo document
   9  */
  10 class OutputPage {
  11         var $mMetatags, $mKeywords;
  12         var $mLinktags, $mPagetitle, $mBodytext, $mDebugtext;
  13         var $mHTMLtitle, $mRobotpolicy, $mIsarticle, $mPrintable;
  14         var $mSubtitle, $mRedirect, $mStatusCode;
  15         var $mLastModified, $mETag, $mCategoryLinks;
  16         var $mScripts, $mLinkColours, $mPageLinkTitle;
  17
  18         var $mAllowUserJs;
  19         var $mSuppressQuickbar;
  20         var $mOnloadHandler;
  21         var $mDoNothing;
  22         var $mContainsOldMagic, $mContainsNewMagic;
  23         var $mIsArticleRelated;
  24         protected $mParserOptions; // lazy initialised, use parserOptions()
  25         var $mShowFeedLinks = false;
  26         var $mEnableClientCache = true;
  27         var $mArticleBodyOnly = false;
  28
  29         var $mNewSectionLink = false;
  30         var $mNoGallery = false;
  31
  32         /**
  33          * Constructor
  34          * Initialise private variables
  35          */
  36         function __construct() {
  37                 global $wgAllowUserJs;
  38                 $this->mAllowUserJs = $wgAllowUserJs;
  39                 $this->mMetatags = $this->mKeywords = $this->mLinktags = array();
  40                 $this->mHTMLtitle = $this->mPagetitle = $this->mBodytext =
  41                 $this->mRedirect = $this->mLastModified =
  42                 $this->mSubtitle = $this->mDebugtext = $this->mRobotpolicy =
  43                 $this->mOnloadHandler = $this->mPageLinkTitle = '';
  44                 $this->mIsArticleRelated = $this->mIsarticle = $this->mPrintable = true;
  45                 $this->mSuppressQuickbar = $this->mPrintable = false;
  46                 $this->mLanguageLinks = array();
  47                 $this->mCategoryLinks = array();
  48                 $this->mDoNothing = false;
  49                 $this->mContainsOldMagic = $this->mContainsNewMagic = 0;
  50                 $this->mParserOptions = null;
  51                 $this->mSquidMaxage = 0;
  52                 $this->mScripts = '';
  53                 $this->mHeadItems = array();
  54                 $this->mETag = false;
  55                 $this->mRevisionId = null;
  56                 $this->mNewSectionLink = false;
  57                 $this->mTemplateIds = array();
  58         }
  59
  60         public function redirect( $url, $responsecode = '302' ) {
  61                 # Strip newlines as a paranoia check for header injection in PHP<5.1.2
  62                 $this->mRedirect = str_replace( "\n", '', $url );
  63                 $this->mRedirectCode = $responsecode;
  64         }
  65
  66         /**
  67          * Set the HTTP status code to send with the output.
  68          *
  69          * @param int $statusCode
  70          * @return nothing
  71          */
  72         function setStatusCode( $statusCode ) { $this->mStatusCode = $statusCode; }
  73
  74         # To add an http-equiv meta tag, precede the name with "http:"
  75         function addMeta( $name, $val ) { array_push( $this->mMetatags, array( $name, $val ) ); }
  76         function addKeyword( $text ) { array_push( $this->mKeywords, $text ); }
  77         function addScript( $script ) { $this->mScripts .= "\t\t".$script; }
  78         function addStyle( $style ) {
  79                 global $wgStylePath, $wgStyleVersion;
  80                 $this->addLink(
  81                                 array(
  82                                         'rel' => 'stylesheet',
  83                                         'href' => $wgStylePath . '/' . $style . '?' . $wgStyleVersion ) );
  84         }
  85
  86         /**
  87          * Add a self-contained script tag with the given contents
  88          * @param string $script JavaScript text, no <script> tags
  89          */
  90         function addInlineScript( $script ) {
  91                 global $wgJsMimeType;
  92                 $this->mScripts .= "<script type=\"$wgJsMimeType\">/*<![CDATA[*/\n$script\n/*]]>*/</script>";
  93         }
  94
  95         function getScript() {
  96                 return $this->mScripts . $this->getHeadItems();
  97         }
  98
  99         function getHeadItems() {
 100                 $s = '';
 101                 foreach ( $this->mHeadItems as $item ) {
 102                         $s .= $item;
 103                 }
 104                 return $s;
 105         }
 106
 107         function addHeadItem( $name, $value ) {
 108                 $this->mHeadItems[$name] = $value;
 109         }
 110
 111         function setETag($tag) { $this->mETag = $tag; }
 112         function setArticleBodyOnly($only) { $this->mArticleBodyOnly = $only; }
 113         function getArticleBodyOnly($only) { return $this->mArticleBodyOnly; }
 114
 115         function addLink( $linkarr ) {
 116                 # $linkarr should be an associative array of attributes. We'll escape on output.
 117                 array_push( $this->mLinktags, $linkarr );
 118         }
 119
 120         function addMetadataLink( $linkarr ) {
 121                 # note: buggy CC software only reads first "meta" link
 122                 static $haveMeta = false;
 123                 $linkarr['rel'] = ($haveMeta) ? 'alternate meta' : 'meta';
 124                 $this->addLink( $linkarr );
 125                 $haveMeta = true;
 126         }
 127
 128         /**
 129          * checkLastModified tells the client to use the client-cached page if
 130          * possible. If sucessful, the OutputPage is disabled so that
 131          * any future call to OutputPage->output() have no effect.
 132          *
 133          * @return bool True iff cache-ok headers was sent.
 134          */
 135         function checkLastModified ( $timestamp ) {
 136                 global $wgCachePages, $wgCacheEpoch, $wgUser, $wgRequest;
 137                 $fname = 'OutputPage::checkLastModified';
 138
 139                 if ( !$timestamp || $timestamp == '19700101000000' ) {
 140                         wfDebug( "$fname: CACHE DISABLED, NO TIMESTAMP\n" );
 141                         return;
 142                 }
 143                 if( !$wgCachePages ) {
 144                         wfDebug( "$fname: CACHE DISABLED\n", false );
 145                         return;
 146                 }
 147                 if( $wgUser->getOption( 'nocache' ) ) {
 148                         wfDebug( "$fname: USER DISABLED CACHE\n", false );
 149                         return;
 150                 }
 151
 152                 $timestamp=wfTimestamp(TS_MW,$timestamp);
 153                 $lastmod = wfTimestamp( TS_RFC2822, max( $timestamp, $wgUser->mTouched, $wgCacheEpoch ) );
 154
 155                 if( !empty( $_SERVER['HTTP_IF_MODIFIED_SINCE'] ) ) {
 156                         # IE sends sizes after the date like this:
 157                         # Wed, 20 Aug 2003 06:51:19 GMT; length=5202
 158                         # this breaks strtotime().
 159                         $modsince = preg_replace( '/;.*$/', '', $_SERVER["HTTP_IF_MODIFIED_SINCE"] );
 160
 161                         wfSuppressWarnings(); // E_STRICT system time bitching
 162                         $modsinceTime = strtotime( $modsince );
 163                         wfRestoreWarnings();
 164
 165                         $ismodsince = wfTimestamp( TS_MW, $modsinceTime ? $modsinceTime : 1 );
 166                         wfDebug( "$fname: -- client send If-Modified-Since: " . $modsince . "\n", false );
 167                         wfDebug( "$fname: --  we might send Last-Modified : $lastmod\n", false );
 168                         if( ($ismodsince >= $timestamp ) && $wgUser->validateCache( $ismodsince ) && $ismodsince >= $wgCacheEpoch ) {
 169                                 # Make sure you're in a place you can leave when you call us!
 170                                 $wgRequest->response()->header( "HTTP/1.0 304 Not Modified" );
 171                                 $this->mLastModified = $lastmod;
 172                                 $this->sendCacheControl();
 173                                 wfDebug( "$fname: CACHED client: $ismodsince ; user: $wgUser->mTouched ; page: $timestamp ; site $wgCacheEpoch\n", false );
 174                                 $this->disable();
 175
 176                                 // Don't output a compressed blob when using ob_gzhandler;
 177                                 // it's technically against HTTP spec and seems to confuse
 178                                 // Firefox when the response gets split over two packets.
 179                                 wfClearOutputBuffers();
 180
 181                                 return true;
 182                         } else {
 183                                 wfDebug( "$fname: READY  client: $ismodsince ; user: $wgUser->mTouched ; page: $timestamp ; site $wgCacheEpoch\n", false );
 184                                 $this->mLastModified = $lastmod;
 185                         }
 186                 } else {
 187                         wfDebug( "$fname: client did not send If-Modified-Since header\n", false );
 188                         $this->mLastModified = $lastmod;
 189                 }
 190         }
 191
 192         function getPageTitleActionText () {
 193                 global $action;
 194                 switch($action) {
 195                         case 'edit':
 196                         case 'delete':
 197                         case 'protect':
 198                         case 'unprotect':
 199                         case 'watch':
 200                         case 'unwatch':
 201                                 // Display title is already customized
 202                                 return '';
 203                         case 'history':
 204                                 return wfMsg('history_short');
 205                         case 'submit':
 206                                 // FIXME: bug 2735; not correct for special pages etc
 207                                 return wfMsg('preview');
 208                         case 'info':
 209                                 return wfMsg('info_short');
 210                         default:
 211                                 return '';
 212                 }
 213         }
 214
 215         public function setRobotpolicy( $str ) { $this->mRobotpolicy = $str; }
 216         public function setHTMLTitle( $name ) {$this->mHTMLtitle = $name; }
 217         public function setPageTitle( $name ) {
 218                 global $action, $wgContLang;
 219                 $name = $wgContLang->convert($name, true);
 220                 $this->mPagetitle = $name;
 221                 if(!empty($action)) {
 222                         $taction =  $this->getPageTitleActionText();
 223                         if( !empty( $taction ) ) {
 224                                 $name .= ' - '.$taction;
 225                         }
 226                 }
 227
 228                 $this->setHTMLTitle( wfMsg( 'pagetitle', $name ) );
 229         }
 230         public function getHTMLTitle() { return $this->mHTMLtitle; }
 231         public function getPageTitle() { return $this->mPagetitle; }
 232         public function setSubtitle( $str ) { $this->mSubtitle = /*$this->parse(*/$str/*)*/; } // @bug 2514
 233         public function getSubtitle() { return $this->mSubtitle; }
 234         public function isArticle() { return $this->mIsarticle; }
 235         public function setPrintable() { $this->mPrintable = true; }
 236         public function isPrintable() { return $this->mPrintable; }
 237         public function setSyndicated( $show = true ) { $this->mShowFeedLinks = $show; }
 238         public function isSyndicated() { return $this->mShowFeedLinks; }
 239         public function setOnloadHandler( $js ) { $this->mOnloadHandler = $js; }
 240         public function getOnloadHandler() { return $this->mOnloadHandler; }
 241         public function disable() { $this->mDoNothing = true; }
 242
 243         public function setArticleRelated( $v ) {
 244                 $this->mIsArticleRelated = $v;
 245                 if ( !$v ) {
 246                         $this->mIsarticle = false;
 247                 }
 248         }
 249         public function setArticleFlag( $v ) {
 250                 $this->mIsarticle = $v;
 251                 if ( $v ) {
 252                         $this->mIsArticleRelated = $v;
 253                 }
 254         }
 255
 256         public function isArticleRelated() { return $this->mIsArticleRelated; }
 257
 258         public function getLanguageLinks() { return $this->mLanguageLinks; }
 259         public function addLanguageLinks($newLinkArray) {
 260                 $this->mLanguageLinks += $newLinkArray;
 261         }
 262         public function setLanguageLinks($newLinkArray) {
 263                 $this->mLanguageLinks = $newLinkArray;
 264         }
 265
 266         public function getCategoryLinks() {
 267                 return $this->mCategoryLinks;
 268         }
 269
 270         /**
 271          * Add an array of categories, with names in the keys
 272          */
 273         public function addCategoryLinks($categories) {
 274                 global $wgUser, $wgContLang;
 275
 276                 if ( !is_array( $categories ) ) {
 277                         return;
 278                 }
 279                 # Add the links to the link cache in a batch
 280                 $arr = array( NS_CATEGORY => $categories );
 281                 $lb = new LinkBatch;
 282                 $lb->setArray( $arr );
 283                 $lb->execute();
 284
 285                 $sk = $wgUser->getSkin();
 286                 foreach ( $categories as $category => $unused ) {
 287                         $title = Title::makeTitleSafe( NS_CATEGORY, $category );
 288                         $text = $wgContLang->convertHtml( $title->getText() );
 289                         $this->mCategoryLinks[] = $sk->makeLinkObj( $title, $text );
 290                 }
 291         }
 292
 293         public function setCategoryLinks($categories) {
 294                 $this->mCategoryLinks = array();
 295                 $this->addCategoryLinks($categories);
 296         }
 297
 298         public function suppressQuickbar() { $this->mSuppressQuickbar = true; }
 299         public function isQuickbarSuppressed() { return $this->mSuppressQuickbar; }
 300
 301         public function disallowUserJs() { $this->mAllowUserJs = false; }
 302         public function isUserJsAllowed() { return $this->mAllowUserJs; }
 303
 304         public function addHTML( $text ) { $this->mBodytext .= $text; }
 305         public function clearHTML() { $this->mBodytext = ''; }
 306         public function getHTML() { return $this->mBodytext; }
 307         public function debug( $text ) { $this->mDebugtext .= $text; }
 308
 309         /* @deprecated */
 310         public function setParserOptions( $options ) {
 311                 return $this->parserOptions( $options );
 312         }
 313
 314         public function parserOptions( $options = null ) {
 315                 if ( !$this->mParserOptions ) {
 316                         $this->mParserOptions = new ParserOptions;
 317                 }
 318                 return wfSetVar( $this->mParserOptions, $options );
 319         }
 320
 321         /**
 322          * Set the revision ID which will be seen by the wiki text parser
 323          * for things such as embedded {{REVISIONID}} variable use.
 324          * @param mixed $revid an integer, or NULL
 325          * @return mixed previous value
 326          */
 327         public function setRevisionId( $revid ) {
 328                 $val = is_null( $revid ) ? null : intval( $revid );
 329                 return wfSetVar( $this->mRevisionId, $val );
 330         }
 331
 332         /**
 333          * Convert wikitext to HTML and add it to the buffer
 334          * Default assumes that the current page title will
 335          * be used.
 336          *
 337          * @param string $text
 338          * @param bool   $linestart
 339          */
 340         public function addWikiText( $text, $linestart = true ) {
 341                 global $wgTitle;
 342                 $this->addWikiTextTitle($text, $wgTitle, $linestart);
 343         }
 344
 345         public function addWikiTextWithTitle($text, &$title, $linestart = true) {
 346                 $this->addWikiTextTitle($text, $title, $linestart);
 347         }
 348
 349         function addWikiTextTitleTidy($text, &$title, $linestart = true) {
 350                 $this->addWikiTextTitle( $text, $title, $linestart, true );
 351         }
 352
 353         public function addWikiTextTitle($text, &$title, $linestart, $tidy = false) {
 354                 global $wgParser;
 355
 356                 $fname = 'OutputPage:addWikiTextTitle';
 357                 wfProfileIn($fname);
 358
 359                 wfIncrStats('pcache_not_possible');
 360
 361                 $popts = $this->parserOptions();
 362                 $popts->setTidy($tidy);
 363
 364                 $parserOutput = $wgParser->parse( $text, $title, $popts,
 365                         $linestart, true, $this->mRevisionId );
 366
 367                 $this->addParserOutput( $parserOutput );
 368
 369                 wfProfileOut($fname);
 370         }
 371
 372         /**
 373          * @todo document
 374          * @param ParserOutput object &$parserOutput
 375          */
 376         public function addParserOutputNoText( &$parserOutput ) {
 377                 $this->mLanguageLinks += $parserOutput->getLanguageLinks();
 378                 $this->addCategoryLinks( $parserOutput->getCategories() );
 379                 $this->mNewSectionLink = $parserOutput->getNewSection();
 380                 $this->addKeywords( $parserOutput );
 381                 if ( $parserOutput->getCacheTime() == -1 ) {
 382                         $this->enableClientCache( false );
 383                 }
 384                 if ( $parserOutput->mHTMLtitle != "" ) {
 385                         $this->mPagetitle = $parserOutput->mHTMLtitle ;
 386                 }
 387                 if ( $parserOutput->mSubtitle != '' ) {
 388                         $this->mSubtitle .= $parserOutput->mSubtitle ;
 389                 }
 390                 $this->mNoGallery = $parserOutput->getNoGallery();
 391                 $this->mHeadItems = array_merge( $this->mHeadItems, (array)$parserOutput->mHeadItems );
 392                 // Versioning...
 393                 $this->mTemplateIds += (array)$parserOutput->mTemplateIds;
 394
 395                 wfRunHooks( 'OutputPageParserOutput', array( &$this, $parserOutput ) );
 396         }
 397
 398         /**
 399          * @todo document
 400          * @param ParserOutput &$parserOutput
 401          */
 402         function addParserOutput( &$parserOutput ) {
 403                 $this->addParserOutputNoText( $parserOutput );
 404                 $text = $parserOutput->getText();
 405                 wfRunHooks( 'OutputPageBeforeHTML',array( &$this, &$text ) );
 406                 $this->addHTML( $text );
 407         }
 408
 409         /**
 410          * Add wikitext to the buffer, assuming that this is the primary text for a page view
 411          * Saves the text into the parser cache if possible.
 412          *
 413          * @param string  $text
 414          * @param Article $article
 415          * @param bool    $cache
 416          * @deprecated Use Article::outputWikitext
 417          */
 418         public function addPrimaryWikiText( $text, $article, $cache = true ) {
 419                 global $wgParser, $wgUser;
 420
 421                 $popts = $this->parserOptions();
 422                 $popts->setTidy(true);
 423                 $parserOutput = $wgParser->parse( $text, $article->mTitle,
 424                         $popts, true, true, $this->mRevisionId );
 425                 $popts->setTidy(false);
 426                 if ( $cache && $article && $parserOutput->getCacheTime() != -1 ) {
 427                         $parserCache =& ParserCache::singleton();
 428                         $parserCache->save( $parserOutput, $article, $wgUser );
 429                 }
 430
 431                 $this->addParserOutput( $parserOutput );
 432         }
 433
 434         /**
 435          * @deprecated use addWikiTextTidy()
 436          */
 437         public function addSecondaryWikiText( $text, $linestart = true ) {
 438                 global $wgTitle;
 439                 $this->addWikiTextTitleTidy($text, $wgTitle, $linestart);
 440         }
 441
 442         /**
 443          * Add wikitext with tidy enabled
 444          */
 445         public function addWikiTextTidy(  $text, $linestart = true ) {
 446                 global $wgTitle;
 447                 $this->addWikiTextTitleTidy($text, $wgTitle, $linestart);
 448         }
 449
 450
 451         /**
 452          * Add the output of a QuickTemplate to the output buffer
 453          *
 454          * @param QuickTemplate $template
 455          */
 456         public function addTemplate( &$template ) {
 457                 ob_start();
 458                 $template->execute();
 459                 $this->addHTML( ob_get_contents() );
 460                 ob_end_clean();
 461         }
 462
 463         /**
 464          * Parse wikitext and return the HTML.
 465          *
 466          * @param string $text
 467          * @param bool   $linestart Is this the start of a line?
 468          * @param bool   $interface ??
 469          */
 470         public function parse( $text, $linestart = true, $interface = false ) {
 471                 global $wgParser, $wgTitle;
 472                 $popts = $this->parserOptions();
 473                 if ( $interface) { $popts->setInterfaceMessage(true); }
 474                 $parserOutput = $wgParser->parse( $text, $wgTitle, $popts,
 475                         $linestart, true, $this->mRevisionId );
 476                 if ( $interface) { $popts->setInterfaceMessage(false); }
 477                 return $parserOutput->getText();
 478         }
 479
 480         /**
 481          * @param Article $article
 482          * @param User    $user
 483          *
 484          * @return bool True if successful, else false.
 485          */
 486         public function tryParserCache( &$article, $user ) {
 487                 $parserCache =& ParserCache::singleton();
 488                 $parserOutput = $parserCache->get( $article, $user );
 489                 if ( $parserOutput !== false ) {
 490                         $this->addParserOutput( $parserOutput );
 491                         return true;
 492                 } else {
 493                         return false;
 494                 }
 495         }
 496
 497         /**
 498          * @param int $maxage Maximum cache time on the Squid, in seconds.
 499          */
 500         public function setSquidMaxage( $maxage ) {
 501                 $this->mSquidMaxage = $maxage;
 502         }
 503
 504         /**
 505          * Use enableClientCache(false) to force it to send nocache headers
 506          * @param $state ??
 507          */
 508         public function enableClientCache( $state ) {
 509                 return wfSetVar( $this->mEnableClientCache, $state );
 510         }
 511
 512         function uncacheableBecauseRequestvars() {
 513                 global $wgRequest;
 514                 return  $wgRequest->getText('useskin', false) === false
 515                         && $wgRequest->getText('uselang', false) === false;
 516         }
 517
 518         public function sendCacheControl() {
 519                 global $wgUseSquid, $wgUseESI, $wgUseETag, $wgSquidMaxage, $wgRequest;
 520                 $fname = 'OutputPage::sendCacheControl';
 521
 522                 if ($wgUseETag && $this->mETag)
 523                         $wgRequest->response()->header("ETag: $this->mETag");
 524
 525                 # don't serve compressed data to clients who can't handle it
 526                 # maintain different caches for logged-in users and non-logged in ones
 527                 $wgRequest->response()->header( 'Vary: Accept-Encoding, Cookie' );
 528                 if( !$this->uncacheableBecauseRequestvars() && $this->mEnableClientCache ) {
 529                         if( $wgUseSquid && session_id() == '' &&
 530                           ! $this->isPrintable() && $this->mSquidMaxage != 0 )
 531                         {
 532                                 if ( $wgUseESI ) {
 533                                         # We'll purge the proxy cache explicitly, but require end user agents
 534                                         # to revalidate against the proxy on each visit.
 535                                         # Surrogate-Control controls our Squid, Cache-Control downstream caches
 536                                         wfDebug( "$fname: proxy caching with ESI; {$this->mLastModified} **\n", false );
 537                                         # start with a shorter timeout for initial testing
 538                                         # header( 'Surrogate-Control: max-age=2678400+2678400, content="ESI/1.0"');
 539                                         $wgRequest->response()->header( 'Surrogate-Control: max-age='.$wgSquidMaxage.'+'.$this->mSquidMaxage.', content="ESI/1.0"');
 540                                         $wgRequest->response()->header( 'Cache-Control: s-maxage=0, must-revalidate, max-age=0' );
 541                                 } else {
 542                                         # We'll purge the proxy cache for anons explicitly, but require end user agents
 543                                         # to revalidate against the proxy on each visit.
 544                                         # IMPORTANT! The Squid needs to replace the Cache-Control header with
 545                                         # Cache-Control: s-maxage=0, must-revalidate, max-age=0
 546                                         wfDebug( "$fname: local proxy caching; {$this->mLastModified} **\n", false );
 547                                         # start with a shorter timeout for initial testing
 548                                         # header( "Cache-Control: s-maxage=2678400, must-revalidate, max-age=0" );
 549                                         $wgRequest->response()->header( 'Cache-Control: s-maxage='.$this->mSquidMaxage.', must-revalidate, max-age=0' );
 550                                 }
 551                         } else {
 552                                 # We do want clients to cache if they can, but they *must* check for updates
 553                                 # on revisiting the page.
 554                                 wfDebug( "$fname: private caching; {$this->mLastModified} **\n", false );
 555                                 $wgRequest->response()->header( 'Expires: ' . gmdate( 'D, d M Y H:i:s', 0 ) . ' GMT' );
 556                                 $wgRequest->response()->header( "Cache-Control: private, must-revalidate, max-age=0" );
 557                         }
 558                         if($this->mLastModified) $wgRequest->response()->header( "Last-modified: {$this->mLastModified}" );
 559                 } else {
 560                         wfDebug( "$fname: no caching **\n", false );
 561
 562                         # In general, the absence of a last modified header should be enough to prevent
 563                         # the client from using its cache. We send a few other things just to make sure.
 564                         $wgRequest->response()->header( 'Expires: ' . gmdate( 'D, d M Y H:i:s', 0 ) . ' GMT' );
 565                         $wgRequest->response()->header( 'Cache-Control: no-cache, no-store, max-age=0, must-revalidate' );
 566                         $wgRequest->response()->header( 'Pragma: no-cache' );
 567                 }
 568         }
 569
 570         /**
 571          * Finally, all the text has been munged and accumulated into
 572          * the object, let's actually output it:
 573          */
 574         public function output() {
 575                 global $wgUser, $wgOutputEncoding, $wgRequest;
 576                 global $wgContLanguageCode, $wgDebugRedirects, $wgMimeType;
 577                 global $wgJsMimeType, $wgStylePath, $wgUseAjax, $wgAjaxSearch, $wgAjaxWatch;
 578                 global $wgServer, $wgStyleVersion;
 579
 580                 if( $this->mDoNothing ){
 581                         return;
 582                 }
 583                 $fname = 'OutputPage::output';
 584                 wfProfileIn( $fname );
 585                 $sk = $wgUser->getSkin();
 586
 587                 if ( $wgUseAjax ) {
 588                         $this->addScript( "<script type=\"{$wgJsMimeType}\" src=\"{$wgStylePath}/common/ajax.js?$wgStyleVersion\"></script>\n" );
 589
 590                         wfRunHooks( 'AjaxAddScript', array( &$this ) );
 591
 592                         if( $wgAjaxSearch ) {
 593                                 $this->addScript( "<script type=\"{$wgJsMimeType}\" src=\"{$wgStylePath}/common/ajaxsearch.js?$wgStyleVersion\"></script>\n" );
 594                                 $this->addScript( "<script type=\"{$wgJsMimeType}\">hookEvent(\"load\", sajax_onload);</script>\n" );
 595                         }
 596
 597                         if( $wgAjaxWatch && $wgUser->isLoggedIn() ) {
 598                                 $this->addScript( "<script type=\"{$wgJsMimeType}\" src=\"{$wgStylePath}/common/ajaxwatch.js?$wgStyleVersion\"></script>\n" );
 599                         }
 600                 }
 601
 602                 if ( '' != $this->mRedirect ) {
 603                         if( substr( $this->mRedirect, 0, 4 ) != 'http' ) {
 604                                 # Standards require redirect URLs to be absolute
 605                                 global $wgServer;
 606                                 $this->mRedirect = $wgServer . $this->mRedirect;
 607                         }
 608                         if( $this->mRedirectCode == '301') {
 609                                 if( !$wgDebugRedirects ) {
 610                                         $wgRequest->response()->header("HTTP/1.1 {$this->mRedirectCode} Moved Permanently");
 611                                 }
 612                                 $this->mLastModified = wfTimestamp( TS_RFC2822 );
 613                         }
 614
 615                         $this->sendCacheControl();
 616
 617                         $wgRequest->response()->header("Content-Type: text/html; charset=utf-8");
 618                         if( $wgDebugRedirects ) {
 619                                 $url = htmlspecialchars( $this->mRedirect );
 620                                 print "<html>\n<head>\n<title>Redirect</title>\n</head>\n<body>\n";
 621                                 print "<p>Location: <a href=\"$url\">$url</a></p>\n";
 622                                 print "</body>\n</html>\n";
 623                         } else {
 624                                 $wgRequest->response()->header( 'Location: '.$this->mRedirect );
 625                         }
 626                         wfProfileOut( $fname );
 627                         return;
 628                 }
 629                 elseif ( $this->mStatusCode )
 630                 {
 631                         $statusMessage = array(
 632                                 100 => 'Continue',
 633                                 101 => 'Switching Protocols',
 634                                 102 => 'Processing',
 635                                 200 => 'OK',
 636                                 201 => 'Created',
 637                                 202 => 'Accepted',
 638                                 203 => 'Non-Authoritative Information',
 639                                 204 => 'No Content',
 640                                 205 => 'Reset Content',
 641                                 206 => 'Partial Content',
 642                                 207 => 'Multi-Status',
 643                                 300 => 'Multiple Choices',
 644                                 301 => 'Moved Permanently',
 645                                 302 => 'Found',
 646                                 303 => 'See Other',
 647                                 304 => 'Not Modified',
 648                                 305 => 'Use Proxy',
 649                                 307 => 'Temporary Redirect',
 650                                 400 => 'Bad Request',
 651                                 401 => 'Unauthorized',
 652                                 402 => 'Payment Required',
 653                                 403 => 'Forbidden',
 654                                 404 => 'Not Found',
 655                                 405 => 'Method Not Allowed',
 656                                 406 => 'Not Acceptable',
 657                                 407 => 'Proxy Authentication Required',
 658                                 408 => 'Request Timeout',
 659                                 409 => 'Conflict',
 660                                 410 => 'Gone',
 661                                 411 => 'Length Required',
 662                                 412 => 'Precondition Failed',
 663                                 413 => 'Request Entity Too Large',
 664                                 414 => 'Request-URI Too Large',
 665                                 415 => 'Unsupported Media Type',
 666                                 416 => 'Request Range Not Satisfiable',
 667                                 417 => 'Expectation Failed',
 668                                 422 => 'Unprocessable Entity',
 669                                 423 => 'Locked',
 670                                 424 => 'Failed Dependency',
 671                                 500 => 'Internal Server Error',
 672                                 501 => 'Not Implemented',
 673                                 502 => 'Bad Gateway',
 674                                 503 => 'Service Unavailable',
 675                                 504 => 'Gateway Timeout',
 676                                 505 => 'HTTP Version Not Supported',
 677                                 507 => 'Insufficient Storage'
 678                         );
 679
 680                         if ( $statusMessage[$this->mStatusCode] )
 681                                 $wgRequest->response()->header( 'HTTP/1.1 ' . $this->mStatusCode . ' ' . $statusMessage[$this->mStatusCode] );
 682                 }
 683
 684                 # Buffer output; final headers may depend on later processing
 685                 ob_start();
 686
 687                 # Disable temporary placeholders, so that the skin produces HTML
 688                 $sk->postParseLinkColour( false );
 689
 690                 $wgRequest->response()->header( "Content-type: $wgMimeType; charset={$wgOutputEncoding}" );
 691                 $wgRequest->response()->header( 'Content-language: '.$wgContLanguageCode );
 692
 693                 if ($this->mArticleBodyOnly) {
 694                         $this->out($this->mBodytext);
 695                 } else {
 696                         wfProfileIn( 'Output-skin' );
 697                         $sk->outputPage( $this );
 698                         wfProfileOut( 'Output-skin' );
 699                 }
 700
 701                 $this->sendCacheControl();
 702                 ob_end_flush();
 703                 wfProfileOut( $fname );
 704         }
 705
 706         /**
 707          * @todo document
 708          * @param string $ins
 709          */
 710         public function out( $ins ) {
 711                 global $wgInputEncoding, $wgOutputEncoding, $wgContLang;
 712                 if ( 0 == strcmp( $wgInputEncoding, $wgOutputEncoding ) ) {
 713                         $outs = $ins;
 714                 } else {
 715                         $outs = $wgContLang->iconv( $wgInputEncoding, $wgOutputEncoding, $ins );
 716                         if ( false === $outs ) { $outs = $ins; }
 717                 }
 718                 print $outs;
 719         }
 720
 721         /**
 722          * @todo document
 723          */
 724         public static function setEncodings() {
 725                 global $wgInputEncoding, $wgOutputEncoding;
 726                 global $wgUser, $wgContLang;
 727
 728                 $wgInputEncoding = strtolower( $wgInputEncoding );
 729
 730                 if ( empty( $_SERVER['HTTP_ACCEPT_CHARSET'] ) ) {
 731                         $wgOutputEncoding = strtolower( $wgOutputEncoding );
 732                         return;
 733                 }
 734                 $wgOutputEncoding = $wgInputEncoding;
 735         }
 736
 737         /**
 738          * Deprecated, use wfReportTime() instead.
 739          * @return string
 740          * @deprecated
 741          */
 742         public function reportTime() {
 743                 $time = wfReportTime();
 744                 return $time;
 745         }
 746
 747         /**
 748          * Produce a "user is blocked" page.
 749          *
 750          * @param bool $return Whether to have a "return to $wgTitle" message or not.
 751          * @return nothing
 752          */
 753         function blockedPage( $return = true ) {
 754                 global $wgUser, $wgContLang, $wgTitle, $wgLang;
 755
 756                 $this->setPageTitle( wfMsg( 'blockedtitle' ) );
 757                 $this->setRobotpolicy( 'noindex,nofollow' );
 758                 $this->setArticleRelated( false );
 759
 760                 $id = $wgUser->blockedBy();
 761                 $reason = $wgUser->blockedFor();
 762                 $ip = wfGetIP();
 763
 764                 if ( is_numeric( $id ) ) {
 765                         $name = User::whoIs( $id );
 766                 } else {
 767                         $name = $id;
 768                 }
 769                 $link = '[[' . $wgContLang->getNsText( NS_USER ) . ":{$name}|{$name}]]";
 770
 771                 $blockid = $wgUser->mBlock->mId;
 772
 773                 $blockExpiry = $wgUser->mBlock->mExpiry;
 774                 if ( $blockExpiry == 'infinity' ) {
 775                         // Entry in database (table ipblocks) is 'infinity' but 'ipboptions' uses 'infinite' or 'indefinite'
 776                         // Search for localization in 'ipboptions'
 777                         $scBlockExpiryOptions = wfMsg( 'ipboptions' );
 778                         foreach ( explode( ',', $scBlockExpiryOptions ) as $option ) {
 779                                 if ( strpos( $option, ":" ) === false )
 780                                         continue;
 781                                 list( $show, $value ) = explode( ":", $option );
 782                                 if ( $value == 'infinite' || $value == 'indefinite' ) {
 783                                         $blockExpiry = $show;
 784                                         break;
 785                                 }
 786                         }
 787                 } else {
 788                         $blockExpiry = $wgLang->timeanddate( wfTimestamp( TS_MW, $blockExpiry ), true );
 789                 }
 790
 791                 if ( $wgUser->mBlock->mAuto ) {
 792                         $msg = 'autoblockedtext';
 793                 } else {
 794                         $msg = 'blockedtext';
 795                 }
 796
 797                 /* $ip returns who *is* being blocked, $intended contains who was meant to be blocked.
 798                  * This could be a username, an ip range, or a single ip. */
 799                 $intended = $wgUser->mBlock->mAddress;
 800
 801                 $this->addWikiText( wfMsg( $msg, $link, $reason, $ip, $name, $blockid, $blockExpiry, $intended ) );
 802
 803                 # Don't auto-return to special pages
 804                 if( $return ) {
 805                         $return = $wgTitle->getNamespace() > -1 ? $wgTitle->getPrefixedText() : NULL;
 806                         $this->returnToMain( false, $return );
 807                 }
 808         }
 809
 810         /**
 811          * Output a standard error page
 812          *
 813          * @param string $title Message key for page title
 814          * @param string $msg Message key for page text
 815          * @param array $params Message parameters
 816          */
 817         public function showErrorPage( $title, $msg, $params = array() ) {
 818                 global $wgTitle;
 819
 820                 $this->mDebugtext .= 'Original title: ' .
 821                   $wgTitle->getPrefixedText() . "\n";
 822                 $this->setPageTitle( wfMsg( $title ) );
 823                 $this->setHTMLTitle( wfMsg( 'errorpagetitle' ) );
 824                 $this->setRobotpolicy( 'noindex,nofollow' );
 825                 $this->setArticleRelated( false );
 826                 $this->enableClientCache( false );
 827                 $this->mRedirect = '';
 828                 $this->mBodytext = '';
 829
 830                 array_unshift( $params, $msg );
 831                 $message = call_user_func_array( 'wfMsg', $params );
 832                 $this->addWikiText( $message );
 833
 834                 $this->returnToMain( false );
 835         }
 836
 837         /** @deprecated */
 838         public function errorpage( $title, $msg ) {
 839                 throw new ErrorPageError( $title, $msg );
 840         }
 841
 842         /**
 843          * Display an error page indicating that a given version of MediaWiki is
 844          * required to use it
 845          *
 846          * @param mixed $version The version of MediaWiki needed to use the page
 847          */
 848         public function versionRequired( $version ) {
 849                 $this->setPageTitle( wfMsg( 'versionrequired', $version ) );
 850                 $this->setHTMLTitle( wfMsg( 'versionrequired', $version ) );
 851                 $this->setRobotpolicy( 'noindex,nofollow' );
 852                 $this->setArticleRelated( false );
 853                 $this->mBodytext = '';
 854
 855                 $this->addWikiText( wfMsg( 'versionrequiredtext', $version ) );
 856                 $this->returnToMain();
 857         }
 858
 859         /**
 860          * Display an error page noting that a given permission bit is required.
 861          *
 862          * @param string $permission key required
 863          */
 864         public function permissionRequired( $permission ) {
 865                 global $wgGroupPermissions, $wgUser;
 866
 867                 $this->setPageTitle( wfMsg( 'badaccess' ) );
 868                 $this->setHTMLTitle( wfMsg( 'errorpagetitle' ) );
 869                 $this->setRobotpolicy( 'noindex,nofollow' );
 870                 $this->setArticleRelated( false );
 871                 $this->mBodytext = '';
 872
 873                 $groups = array();
 874                 foreach( $wgGroupPermissions as $key => $value ) {
 875                         if( isset( $value[$permission] ) && $value[$permission] == true ) {
 876                                 $groupName = User::getGroupName( $key );
 877                                 $groupPage = User::getGroupPage( $key );
 878                                 if( $groupPage ) {
 879                                         $skin = $wgUser->getSkin();
 880                                         $groups[] = $skin->makeLinkObj( $groupPage, $groupName );
 881                                 } else {
 882                                         $groups[] = $groupName;
 883                                 }
 884                         }
 885                 }
 886                 $n = count( $groups );
 887                 $groups = implode( ', ', $groups );
 888                 switch( $n ) {
 889                         case 0:
 890                         case 1:
 891                         case 2:
 892                                 $message = wfMsgHtml( "badaccess-group$n", $groups );
 893                                 break;
 894                         default:
 895                                 $message = wfMsgHtml( 'badaccess-groups', $groups );
 896                 }
 897                 $this->addHtml( $message );
 898                 $this->returnToMain( false );
 899         }
 900
 901         /**
 902          * Use permissionRequired.
 903          * @deprecated
 904          */
 905         public function sysopRequired() {
 906                 throw new MWException( "Call to deprecated OutputPage::sysopRequired() method\n" );
 907         }
 908
 909         /**
 910          * Use permissionRequired.
 911          * @deprecated
 912          */
 913         public function developerRequired() {
 914                 throw new MWException( "Call to deprecated OutputPage::developerRequired() method\n" );
 915         }
 916
 917         /**
 918          * Produce the stock "please login to use the wiki" page
 919          */
 920         public function loginToUse() {
 921                 global $wgUser, $wgTitle, $wgContLang;
 922
 923                 if( $wgUser->isLoggedIn() ) {
 924                         $this->permissionRequired( 'read' );
 925                         return;
 926                 }
 927
 928                 $skin = $wgUser->getSkin();
 929
 930                 $this->setPageTitle( wfMsg( 'loginreqtitle' ) );
 931                 $this->setHtmlTitle( wfMsg( 'errorpagetitle' ) );
 932                 $this->setRobotPolicy( 'noindex,nofollow' );
 933                 $this->setArticleFlag( false );
 934
 935                 $loginTitle = SpecialPage::getTitleFor( 'Userlogin' );
 936                 $loginLink = $skin->makeKnownLinkObj( $loginTitle, wfMsgHtml( 'loginreqlink' ), 'returnto=' . $wgTitle->getPrefixedUrl() );
 937                 $this->addHtml( wfMsgWikiHtml( 'loginreqpagetext', $loginLink ) );
 938                 $this->addHtml( "\n<!--" . $wgTitle->getPrefixedUrl() . "-->" );
 939
 940                 # Don't return to the main page if the user can't read it
 941                 # otherwise we'll end up in a pointless loop
 942                 $mainPage = Title::newMainPage();
 943                 if( $mainPage->userCanRead() )
 944                         $this->returnToMain( true, $mainPage );
 945         }
 946
 947         /** @deprecated */
 948         public function databaseError( $fname, $sql, $error, $errno ) {
 949                 throw new MWException( "OutputPage::databaseError is obsolete\n" );
 950         }
 951
 952         /**
 953          * @todo document
 954          * @param bool  $protected Is the reason the page can't be reached because it's protected?
 955          * @param mixed $source
 956          */
 957         public function readOnlyPage( $source = null, $protected = false ) {
 958                 global $wgUser, $wgReadOnlyFile, $wgReadOnly, $wgTitle;
 959                 $skin = $wgUser->getSkin();
 960
 961                 $this->setRobotpolicy( 'noindex,nofollow' );
 962                 $this->setArticleRelated( false );
 963
 964                 if( $protected ) {
 965                         $this->setPageTitle( wfMsg( 'viewsource' ) );
 966                         $this->setSubtitle( wfMsg( 'viewsourcefor', $skin->makeKnownLinkObj( $wgTitle ) ) );
 967
 968                         list( $cascadeSources, /* $restrictions */ ) = $wgTitle->getCascadeProtectionSources();
 969
 970                         # Determine if protection is due to the page being a system message
 971                         # and show an appropriate explanation
 972                         if( $wgTitle->getNamespace() == NS_MEDIAWIKI ) {
 973                                 $this->addWikiText( wfMsg( 'protectedinterface' ) );
 974                         } if ( $cascadeSources && count($cascadeSources) > 0 ) {
 975                                 $titles = '';
 976
 977                                 foreach ( $cascadeSources as $title ) {
 978                                         $titles .= '* [[:' . $title->getPrefixedText() . "]]\n";
 979                                 }
 980
 981                                 $notice = wfMsgExt( 'cascadeprotected', array('parsemag'), count($cascadeSources) ) . "\n$titles";
 982
 983                                 $this->addWikiText( $notice );
 984                         } else {
 985                                 $this->addWikiText( wfMsg( 'protectedpagetext' ) );
 986                         }
 987                 } else {
 988                         $this->setPageTitle( wfMsg( 'readonly' ) );
 989                         if ( $wgReadOnly ) {
 990                                 $reason = $wgReadOnly;
 991                         } else {
 992                                 $reason = file_get_contents( $wgReadOnlyFile );
 993                         }
 994                         $this->addWikiText( wfMsg( 'readonlytext', $reason ) );
 995                 }
 996
 997                 if( is_string( $source ) ) {
 998                         $this->addWikiText( wfMsg( 'viewsourcetext' ) );
 999                         $rows = $wgUser->getIntOption( 'rows' );
1000                         $cols = $wgUser->getIntOption( 'cols' );
1001                         $text = "\n<textarea name='wpTextbox1' id='wpTextbox1' cols='$cols' rows='$rows' readonly='readonly'>" .
1002                                 htmlspecialchars( $source ) . "\n</textarea>";
1003                         $this->addHTML( $text );
1004                 }
1005                 $article = new Article($wgTitle);
1006                 $this->addHTML( $skin->formatTemplates($article->getUsedTemplates()) );
1007
1008                 $this->returnToMain( false );
1009         }
1010
1011         /** @deprecated */
1012         public function fatalError( $message ) {
1013                 throw new FatalError( $message );
1014         }
1015
1016         /** @deprecated */
1017         public function unexpectedValueError( $name, $val ) {
1018                 throw new FatalError( wfMsg( 'unexpected', $name, $val ) );
1019         }
1020
1021         /** @deprecated */
1022         public function fileCopyError( $old, $new ) {
1023                 throw new FatalError( wfMsg( 'filecopyerror', $old, $new ) );
1024         }
1025
1026         /** @deprecated */
1027         public function fileRenameError( $old, $new ) {
1028                 throw new FatalError( wfMsg( 'filerenameerror', $old, $new ) );
1029         }
1030
1031         /** @deprecated */
1032         public function fileDeleteError( $name ) {
1033                 throw new FatalError( wfMsg( 'filedeleteerror', $name ) );
1034         }
1035
1036         /** @deprecated */
1037         public function fileNotFoundError( $name ) {
1038                 throw new FatalError( wfMsg( 'filenotfound', $name ) );
1039         }
1040
1041         public function showFatalError( $message ) {
1042                 $this->setPageTitle( wfMsg( "internalerror" ) );
1043                 $this->setRobotpolicy( "noindex,nofollow" );
1044                 $this->setArticleRelated( false );
1045                 $this->enableClientCache( false );
1046                 $this->mRedirect = '';
1047                 $this->mBodytext = $message;
1048         }
1049
1050         public function showUnexpectedValueError( $name, $val ) {
1051                 $this->showFatalError( wfMsg( 'unexpected', $name, $val ) );
1052         }
1053
1054         public function showFileCopyError( $old, $new ) {
1055                 $this->showFatalError( wfMsg( 'filecopyerror', $old, $new ) );
1056         }
1057
1058         public function showFileRenameError( $old, $new ) {
1059                 $this->showFatalError( wfMsg( 'filerenameerror', $old, $new ) );
1060         }
1061
1062         public function showFileDeleteError( $name ) {
1063                 $this->showFatalError( wfMsg( 'filedeleteerror', $name ) );
1064         }
1065
1066         public function showFileNotFoundError( $name ) {
1067                 $this->showFatalError( wfMsg( 'filenotfound', $name ) );
1068         }
1069
1070         /**
1071          * return from error messages or notes
1072          * @param $auto automatically redirect the user after 10 seconds
1073          * @param $returnto page title to return to. Default is Main Page.
1074          */
1075         public function returnToMain( $auto = true, $returnto = NULL ) {
1076                 global $wgUser, $wgOut, $wgRequest;
1077
1078                 if ( $returnto == NULL ) {
1079                         $returnto = $wgRequest->getText( 'returnto' );
1080                 }
1081
1082                 if ( '' === $returnto ) {
1083                         $returnto = Title::newMainPage();
1084                 }
1085
1086                 if ( is_object( $returnto ) ) {
1087                         $titleObj = $returnto;
1088                 } else {
1089                         $titleObj = Title::newFromText( $returnto );
1090                 }
1091                 if ( !is_object( $titleObj ) ) {
1092                         $titleObj = Title::newMainPage();
1093                 }
1094
1095                 $sk = $wgUser->getSkin();
1096                 $link = $sk->makeLinkObj( $titleObj, '' );
1097
1098                 $r = wfMsg( 'returnto', $link );
1099                 if ( $auto ) {
1100                         $wgOut->addMeta( 'http:Refresh', '10;url=' . $titleObj->escapeFullURL() );
1101                 }
1102                 $wgOut->addHTML( "\n<p>$r</p>\n" );
1103         }
1104
1105         /**
1106          * This function takes the title (first item of mGoodLinks), categories, existing and broken links for the page
1107          * and uses the first 10 of them for META keywords
1108          *
1109          * @param ParserOutput &$parserOutput
1110          */
1111         private function addKeywords( &$parserOutput ) {
1112                 global $wgTitle;
1113                 $this->addKeyword( $wgTitle->getPrefixedText() );
1114                 $count = 1;
1115                 $links2d =& $parserOutput->getLinks();
1116                 if ( !is_array( $links2d ) ) {
1117                         return;
1118                 }
1119                 foreach ( $links2d as $dbkeys ) {
1120                         foreach( $dbkeys as $dbkey => $unused ) {
1121                                 $this->addKeyword( $dbkey );
1122                                 if ( ++$count > 10 ) {
1123                                         break 2;
1124                                 }
1125                         }
1126                 }
1127         }
1128
1129         /**
1130          * @return string The doctype, opening <html>, and head element.
1131          */
1132         public function headElement() {
1133                 global $wgDocType, $wgDTD, $wgContLanguageCode, $wgOutputEncoding, $wgMimeType;
1134                 global $wgXhtmlDefaultNamespace, $wgXhtmlNamespaces;
1135                 global $wgUser, $wgContLang, $wgUseTrackbacks, $wgTitle, $wgStyleVersion;
1136
1137                 if( $wgMimeType == 'text/xml' || $wgMimeType == 'application/xhtml+xml' || $wgMimeType == 'application/xml' ) {
1138                         $ret = "<?xml version=\"1.0\" encoding=\"$wgOutputEncoding\" ?>\n";
1139                 } else {
1140                         $ret = '';
1141                 }
1142
1143                 $ret .= "<!DOCTYPE html PUBLIC \"$wgDocType\"\n        \"$wgDTD\">\n";
1144
1145                 if ( '' == $this->getHTMLTitle() ) {
1146                         $this->setHTMLTitle(  wfMsg( 'pagetitle', $this->getPageTitle() ));
1147                 }
1148
1149                 $rtl = $wgContLang->isRTL() ? " dir='RTL'" : '';
1150                 $ret .= "<html xmlns=\"{$wgXhtmlDefaultNamespace}\" ";
1151                 foreach($wgXhtmlNamespaces as $tag => $ns) {
1152                         $ret .= "xmlns:{$tag}=\"{$ns}\" ";
1153                 }
1154                 $ret .= "xml:lang=\"$wgContLanguageCode\" lang=\"$wgContLanguageCode\" $rtl>\n";
1155                 $ret .= "<head>\n<title>" . htmlspecialchars( $this->getHTMLTitle() ) . "</title>\n";
1156                 array_push( $this->mMetatags, array( "http:Content-type", "$wgMimeType; charset={$wgOutputEncoding}" ) );
1157
1158                 $ret .= $this->getHeadLinks();
1159                 global $wgStylePath;
1160                 if( $this->isPrintable() ) {
1161                         $media = '';
1162                 } else {
1163                         $media = "media='print'";
1164                 }
1165                 $printsheet = htmlspecialchars( "$wgStylePath/common/wikiprintable.css?$wgStyleVersion" );
1166                 $ret .= "<link rel='stylesheet' type='text/css' $media href='$printsheet' />\n";
1167
1168                 $sk = $wgUser->getSkin();
1169                 $ret .= $sk->getHeadScripts( $this->mAllowUserJs );
1170                 $ret .= $this->mScripts;
1171                 $ret .= $sk->getUserStyles();
1172                 $ret .= $this->getHeadItems();
1173
1174                 if ($wgUseTrackbacks && $this->isArticleRelated())
1175                         $ret .= $wgTitle->trackbackRDF();
1176
1177                 $ret .= "</head>\n";
1178                 return $ret;
1179         }
1180
1181         /**
1182          * @return string HTML tag links to be put in the header.
1183          */
1184         public function getHeadLinks() {
1185                 global $wgRequest;
1186                 $ret = '';
1187                 foreach ( $this->mMetatags as $tag ) {
1188                         if ( 0 == strcasecmp( 'http:', substr( $tag[0], 0, 5 ) ) ) {
1189                                 $a = 'http-equiv';
1190                                 $tag[0] = substr( $tag[0], 5 );
1191                         } else {
1192                                 $a = 'name';
1193                         }
1194                         $ret .= "<meta $a=\"{$tag[0]}\" content=\"{$tag[1]}\" />\n";
1195                 }
1196
1197                 $p = $this->mRobotpolicy;
1198                 if( $p !== '' && $p != 'index,follow' ) {
1199                         // http://www.robotstxt.org/wc/meta-user.html
1200                         // Only show if it's different from the default robots policy
1201                         $ret .= "<meta name=\"robots\" content=\"$p\" />\n";
1202                 }
1203
1204                 if ( count( $this->mKeywords ) > 0 ) {
1205                         $strip = array(
1206                                 "/<.*?>/" => '',
1207                                 "/_/" => ' '
1208                         );
1209                         $ret .= "\t\t<meta name=\"keywords\" content=\"" .
1210                           htmlspecialchars(preg_replace(array_keys($strip), array_values($strip),implode( ",", $this->mKeywords ))) . "\" />\n";
1211                 }
1212                 foreach ( $this->mLinktags as $tag ) {
1213                         $ret .= "\t\t<link";
1214                         foreach( $tag as $attr => $val ) {
1215                                 $ret .= " $attr=\"" . htmlspecialchars( $val ) . "\"";
1216                         }
1217                         $ret .= " />\n";
1218                 }
1219                 if( $this->isSyndicated() ) {
1220                         # FIXME: centralize the mime-type and name information in Feed.php
1221                         $link = $wgRequest->escapeAppendQuery( 'feed=rss' );
1222                         $ret .= "<link rel='alternate' type='application/rss+xml' title='RSS 2.0' href='$link' />\n";
1223                         $link = $wgRequest->escapeAppendQuery( 'feed=atom' );
1224                         $ret .= "<link rel='alternate' type='application/atom+xml' title='Atom 1.0' href='$link' />\n";
1225                 }
1226
1227                 return $ret;
1228         }
1229
1230         /**
1231          * Turn off regular page output and return an error reponse
1232          * for when rate limiting has triggered.
1233          * @todo i18n
1234          */
1235         public function rateLimited() {
1236                 global $wgOut;
1237                 $wgOut->disable();
1238                 wfHttpError( 500, 'Internal Server Error',
1239                         'Sorry, the server has encountered an internal error. ' .
1240                         'Please wait a moment and hit "refresh" to submit the request again.' );
1241         }
1242
1243         /**
1244          * Show an "add new section" link?
1245          *
1246          * @return bool True if the parser output instructs us to add one
1247          */
1248         public function showNewSectionLink() {
1249                 return $this->mNewSectionLink;
1250         }
1251
1252         /**
1253          * Show a warning about slave lag
1254          *
1255          * If the lag is higher than 30 seconds, then the warning is
1256          * a bit more obvious
1257          *
1258          * @param int $lag Slave lag
1259          */
1260         public function showLagWarning( $lag ) {
1261                 global $wgSlaveLagWarning, $wgSlaveLagCritical;
1262
1263                 if ($lag < $wgSlaveLagWarning)
1264                         return;
1265
1266                 $message = ($lag >= $wgSlaveLagCritical) ? 'lag-warn-high' : 'lag-warn-normal';
1267                 $warning = wfMsgHtml( $message, htmlspecialchars( $lag ) );
1268                 $this->addHtml( "<div class=\"mw-{$message}\">\n{$warning}\n</div>\n" );
1269         }
1270
1271 }
1272
1273 ?>